碳化硅对莫来石-铝矾土浇注料力学性能的影响.pdf

第31卷第1期
热处理技术与装备
Vol. 31. No
2010年2月
RECHULI JISHU YU ZIIUANGBEI
Feb.2010
材料研究?
碳化硅对莫来石-铝矶土浇注料力学性能的影响
张巍,戴文勇,千代田修明
(派力固(大连)エ业有服公司汉宁大连11660)
摘要:以荽来石、铝矾土为主要原料,铝酸钙水泥为结合系统,分别研究了不同碳化硅含量经过不
同热处理温度后对莫来石铝阢土浇注料性能的影响。试样自然干燥24h脱模后,再经110℃烘干
24h,在空气中分别于1000℃、1300℃和1500℃热处理3h。检测各种温度热处理后试样的线变化
率、抗折强度、耐压强度和耐磨性能。结果表明,当ω(碳化硅)=10%时,莫来石-铝况土浇注料经过
1000℃和1300℃热处理后的线收缩率出现最小值。由于热处理过程中形成的适量SiO2液相有助
于浇注籵表面防氧化尊膜的形成,提高了材料的抗氧化性能,防止碳化硅的进一步氧化,保护了碳化
硅材料,增大了材料的强度。在本实验条件下,SiC加入量为o(碳化硅)=10%时,浇注料的力学性
能最好。
关键词:碳化硅;莫来石;铝矾土;浇注枓;力学性能
中图分类号:TB33:TQ175.6文献标识码:A文章编号:1673-4971(2010)01-0032-04
Effect of Silicon Carbide on Mechanical Property of
Mullite-bauxite Castable Refractory
ZHANG Wei, DAI Wen-yong, Nobuaki Chiyoda
Plibrico( Dalian )Industries Co, Ltd,, Dalian Liaoning 116600, China)
Abstract: The effects of different silicon carbide contents on the mechanical properties of mullite-bauxite
castable refractory are anal yzed respectively by taking the mullite, bauxite as main raw materials and taking
calcium aluminate cement as the binding system. After 24 h curing in mould and another 24 h curing at
110 C after demoulding, the specimens are heat treated at 1000 C, 1300C and 1500 Cfor 3 h in air
respectively, The permanent linear change, modulus of rupture, cold crushing strength and abrasion resist
ance are examined. The results show that shrinkage of mullite-bauxite castable refractory is the least when
w(ic)=10% after heat treated 1000 and 1300 At low emperature, Sic was oxidized and formed
a little liquid phase, which could contribute to forming a antioxidation film and improving the oxidation re.
sistance, estrain the oxidation of Si, protect Si con ining materal, and improving the strength of te
materials Under the experimental conditions, the castables performed the best mechanical properties when
o(Sic)=10% Sic is added
Key words: ilicon carbide; mullite; bauxite; castable refractory; mechanical propertie
0前言
以莫来石、铝矾土为基体的浇注料,初始加热时
收稿日期:2009-04-07
作者简介:张巍(1982-),男,硕土,主要从事不定形耐火材料的研究开发。
联系电话:041-87061638;E-mail:cnzhangweil2008@126.com
万方数据